Film package



March 29, 1938. J. K. RULON 2,112,816

FILM PACKAGE Filed Aug. 18, 1937 23 I INVENTOR .lnseph Keen Ruluri.

ATTORN EY Patented Mar. 29, 1938 UNITED STATES PATENT OFFICE Pont FilmManufacturing Corporation,

Inc.,

New York, N. Y., a corporation of Delaware Application August 18, 1937,Serial No. 159,802

5 Claims.

This invention relates to packaging and more particularly to an improvedpackage for dental X-ray film. A principal object of this invention isto provide a simplified lightproof dental X-ray package that will permitthe rapid removal of the exposed film therefrom without harming thedelicate sensitized surfaces of the film. An object of equal importanceis to provide such a package that may be rapidly and economicallyassembled and sealed by relatively simplified packaging machinery inmass production. A further object is to provide a method for thelightproof packaging of sensitized elements. Additional and moredetailed objects will plainly appear from the specification and drawingpresented herewith in exemplification but not in limitation of thepresent invention. Like reference characters represent like elements inthe drawing which represents diagrammatically in:

Fig. 1, a perspective view of the assembled package;

Fig. 2, a vertical cross sectional view of the package shown in Fig. 1,taken on the line 22;

Fig. 3, a plan view of the envelope shown in Fig. 1 in an unfoldedposition;

Fig. 4, a plan view of the combined pull tab and lightproof wrapper 25used in the package shown in Fig. 1;

Fig. 5 represents a plan view of a dental X-ray film; and

Fig. 6 represents a plan view of a lightproof and X-ray imperviousbacking member.

In assembling the package shown in Fig. 1 the film 22 may be positionedupon the central portion 36 of the wrapper and withdrawing strip 25. Thefiap member 31 may then be folded over the film 22 and the backingmember 23 may then be superposed upon the flap 31. The film thus wrappedis then placed upon the central portion of the envelope 24 so that theextended pull tab portion 35 is adjacent to the closure flap 39. Thecorner flaps 42 and the relatively narrow edge flaps 4| of the envelope,24 may then be folded over the backing 23 which rests upon the fiap 31.The lower flap 40 of the envelope 24 is next folded over the wrappedfilm and the backing 23 so that it covers the two edge flaps 4| and thetwo lower corner flaps 42 and may be secured thereto by a non-foggingvadhesive. Next the tab member 35 may then be folded down over the fiap40 and finally the closure flap 39 is folded over the portion of tabmember 35 so that the tab 35 protrudes from under the flap 39 as shownin Fig. 1. The flap 39 is sealed at its corners to the flap 4!] by meansof a non-fogging adhesive.

In opening the package shown in Fig. 1 the operator grasps the pull tab35 and pulls it back so that the perforations 43 in the flap 39 act tosever the flap and by a continued pull the film 22 may be removed fromthe package still folded in the members 36 and 31 of the wrapper 25.

The pull tab member 35 shown in Fig. 4 is preferably provided withprojecting shoulders 38 which afford an additional light seal incombination with the envelope flap members 4|, 42 and 39 shown in Fig.3. The wrapping member 25 is preferably formed of lightproof paper andthe envelope 24 is preferably formed of lightproof and waterproof paperWhose exterior surface may be pebbled. The backing member 23 ispreferably formed of a thin sheet of material impervious to X-ray suchas lead-foil or a paper containing a compound impervious to X-rays.While the flap 39 may be preferably provided with the perforations 43the envelope 24 may also operate without these perforations. In thiscase the pull on the tab 35 acts to sever the flap 39 from its adhesiveand causes the flap 39 to fold open as a unit permitting the continuedpull to remove the film 22 enfolded in the wrapper 25. When theperforations are omitted a tacky adhesive instead of a quick-drying oneis preferably employed to seal the flap 39.

While the foregoing specification and drawing set forth preferredexemplifications of the present invention it is intended to include allvariations and modifications within the spirit and scope of the appendedclaims.

I claim:

1. The method of packaging dental X-ray film that includes the steps ofenfolding said film in a combined wrapping and withdrawing stripconsisting of a central portion on which the film is positioned, a flapmember of similar area folded over said film, and an oppositewithdrawing member provided with a pull tab; positioning a backingmember impervious to X- rays over said folded flap member; folding saidwithdrawing member over said backing member and said folded fiap member;enclosing the film thus wrapped in an envelope provided with oppositemarginal cover flaps, so that said withdrawing member will be foldedover one of said cover flaps of said envelope and under the oppositecover flap of said envelope so that said pull tab will project fromunder said opposite cover 2. A photographic film pack comprising incombination a sensitized film, a combined wrapper and withdrawing stripconsisting of a central portion on which the film is positioned, aportion of similar areafolded over said film, the central portion beingextended to form a pull tab, said film and wrapper being enclosed andsealed in an envelope formed of sheet material cut and folded to affordedge flaps turned inwardly, a lower flap turned over and sealed to theedge flaps and an upper closure flap extending over the pull tab andbeing sealed to the lower flap, said pull tab being folded under saidclosure flap, and extending beyond the lower edge of the same.

3. A dental X-ray film pack comprising in combination a sensitized film,a combined wrapper and withdrawing strip -of lightproof paper consistingof a central portion on which the film is positioned, a portion ofsimilar area folded over said film, the central portion being extendedto form a pull tab, said film and wrapper being enclosed and sealed inan envelope formed of a single sheet of lightproof and waterproof paperout and folded to afford edge flaps turned inwardly, a lower flap turnedover and sealed to the edge 'fiaps and an upper closure flap extendingover the pull tab and being sealed to the lower flap, said pull tabbeing folded under said closure flap and extending beyond the lower edgeof the same, and asheet of backing material impervious to X-raysinterposed between the wrapper and envelope.

4. A dental X-ray film pack comprising in combination a sensitized film,a combined wrapper and withdrawing strip of lightproof paper consistingof a central portion on which the film is positioned, a portion ofsimilar area folded over said film, the central portion being extendedto form a pull tab, said film and wrapper being enclosed and sealed inan envelope formed of a single sheet of lightproof and waterproof paperout and folded to afford edge flaps turned inwardly, a lower fiap turnedover and sealed to the edge fiaps and an upper closure fiap extendingover the pull tab and being sealed to the lower fiap, said pull tabbeing folded under said closure flap and extending beyond the lower edgeof the same, and a sheet of backing material impervious to X-raysinterposed between the wrapper and envelope, said envelope being furtherprovided with in-turned corner flaps of small area.

5. A dental X-ray film pack comprising in combination a sensitized film,a combined wrapper and. withdrawing strip of lightproof paper consistingof a central portion on which the film is positioned, aportion ofsimilar area folded over said film,, the central portion being extendedto form a pull tab, said film and wrapper being enclosed and sealed inan envelope formed of a single sheet of lightproof and waterproof paperout and fold- .7

flap, said pull tab being folded under said closure flap and extendingbeyond the lower edge of the same, and a sheet of lead foil interposedbetween said wrapper and envelope, said closure flap being provided withperforations positioned over the outline of the pull tab.

' JOSEPH KEEN RULON.

